Basics about Radiation

Frequently Asked Questions and Answers About Radiation

	What is the difference between radiation and radioactivity?
	Please explain about the basics of radiation and units.
	How is gray (Gy) different from sievert (Sv)?
	At what levels of radiation, what kinds of effects are caused on the human body?
	When we come close to a person who was exposed to radiation, or go to a place that was exposed to radiation, will we be also exposed to radiation?
	What is the first thing we should do when we are exposed to radiation? How long does it take for radiation to disappear after exposure?
	How is radiation utilized in modern medicine?
	It is said that people are exposed to radiation in everyday life. When are we exposed to radiation? How much radiation dose do we receive?
	Is daily exposure to radiation (e.g., radiation dose of 4mSv from a gastric X-ray examination) harmless for our body?
	We often hear the term, “radiation emergency medicine.” What kind of medical care is this?